Method for producing coating for AZ91D magnesium alloy vehicle active safety device component

Abstract

The invention discloses a method for producing a coating for an AZ91D magnesium alloy vehicle active safety device component. The method is characterized by comprising the steps of conducting cleaning, degreasing, rust removal, washing and drying on the surface of the AZ91D magnesium alloy vehicle active safety device component, and immediately conducting protection with inert gas; adopting uniformly-mixed composite powder with the constituents being Ni-Cr-Ce-La-In, and forming a surface material layer on the surface of the AZ91D magnesium alloy vehicle active safety device component through a plasma arc spraying method, wherein the main constituents of the surface material layer are Ni-Cr-Ce-La-In, the diameters or the length dimensions of 75% or above of microcrystal units or particles of the surface material layer are within the range from 1 nm to 1500 nm, the different microcrystal units or particles are in close integration, the component surface material layer and a base material are integrated into a whole, and more than the distance, located within more than 30% of the contact surface area of the component surface material layer and the base material, between the component surface material layer and an atom order region of the base material is not more than 4 nm.

Description

technical field [0001] The invention relates to a coating manufacturing method for an AZ91D magnesium alloy automobile active safety device part. Background technique [0002] The AZ91D magnesium alloy is one of the lightest metals among practical metal materials for automobiles. It has the characteristics of high specific strength, specific stiffness, excellent shock absorption and cutting performance, and is suitable for lightweight design of parts. AZ91D magnesium alloy parts treated with surface anti-oxidation and corrosion technology have good anti-corrosion performance and good mechanical properties, and can be used to produce automobiles and other various parts. [0003] Tire active safety device is a tire burst emergency active safety device installed in the car tire and on the wheel hub, which can avoid various traffic accidents caused by the tire blowout of the running car, and the driving vehicle can continue to drive under control for 10 -50 kilometers, it can s...

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Problems solved by technology

[0005] According to the results of literature search and patent search, at present, there is no manufacturing method of nano-Cr-Ce-La-In composite anti-corrosion coating on the surface of AZ91D magnesium alloy automotive active safety device parts or an anti-corrosion coating with a contact surface area of ​​more than 30% of the anti-corrosion coating Related patent literature reports on the coating manufacturing method with a distance of no more than 4nm from the atomically ordered region of the substrate material

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